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BMJ 2010; 340 doi: (Published 07 April 2010) Cite this as: BMJ 2010;340:c1885

Last year air travellers in Canada lost the option of fur- and feather-free flights when Air Canada reversed its prohibition of small pets travelling in aeroplane cabins. The change was welcomed by pet owners, but 10% of people have allergies to animals, and the consequences of a severe reaction at high altitude can be dangerous. Seating people with known allergies away from those sitting with animals isn’t realistic, and dander remains on seats long after the offending pet has left. An editorial in CMAJ calls for the airlines to put the needs of their human passengers first (2010;182:421, doi:10.1503/cmaj.100100).

High dietary intake of magnesium might reduce the risk of colorectal cancer in Japanese men, but not in Japanese women, suggests a study in the Journal of Nutrition (2010;140:779-85, doi:10.3945/jn.109.117747). Interested by reports that magnesium intake seems to be inversely associated with colorectal cancer in Western populations, researchers analysed data from Japan. They identified a similar association in men only, and they also found inverse associations in men who consumed alcohol regularly or who had a body mass index less than 25 …

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